martin



(No Model.) 3 Sheets-Sheet 1. J. W. MARTIN.

HOIST, &c.

,678. Patented Dec. 22, 1896.

(NdModeL) 3 Sheets-Sheet 2. J. W. MARTIN.

HOIST, &c.

No. 573,678. V Patented Dec. 22, 1896.

(No Model.) 3 Sheets-Sheet 3. J. W. MARTIN. HOIST, &c. No. 573,678.Patented Dec. 22, 1896.

xvi/[wrap UNITED STATES PATENT OFFICE.

JAMES WILSON MARTIN, OF MANCHESTER, ENGLAND.

HOIST, 86C.

SPECIFICATION forming part of Letters Patent No. 573,678, dated December22, 1896.

Application filed November 4, 1395. Serial No. 567,909. (No model)Patented in England February 18, 1895, No. 3,451-

To wZZ whom it may concern.-

Be it known that 1, JAMES WILSON MARTIN, a subject of the Queen of GreatBritain, residing at Manchester, in the county of Lancaster, England,have invented certain new and useful Improvements in and Relating toHoists and the Like, (for which I have obtained a patent in GreatBritain, No. 3,451, dated February 18, 1895;) and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to improvements in hoists and the like wherein oneor more handrails or a safetygate placed across the entrance to thehoist-cage when the same is in motion is lifted to a vertical positionwhen the cage is stopped at a stage or landing and thereby causes one ormore grippers attached to the hand-rail to firmly hold the hand-ropecontrolling the action of the hoist from being operated upon; and theobjects of my improvements are, first, to render it impossible to setthe hoist-cage in motion while goods or passengers are entering orleaving the cage; second, to prevent accidents arising therefrom. Iattain these objects by the mechanism illustrated in the accompanyingdrawings, in which the same letters of reference indicate the same partsthroughout the several views, in which- Figure 1 is an elevation of onearrangement of my invention, showing the gripper out of contact with thehand-rope, as when the cage is in motion. Fig. 2 is an elevation of thesame arrangement, showing the gripper in contact with and firmly holdingthe handrope when the cage is stationary. Fig. 3 is a section of thegripper when in the position indicated in Fig. 1. Fig. 4 is a section ofthe same gripper when in the position indicated in Fig. 2. Fig. 5 is anelevation of another arrangement of my invention as when the cage is inmotion. Fig. 6 is an elevation of the same arrangement as when the cageis stationary. Fig. 7 is a longitudinal section through the form ofgripper used in this arrangement. Fig. 8 is a transverse section of thesame gripper when in the position indicated in Fig. 6. Fig. 9 is atransverse section of the same gripper when in the position indicated inFig. 5. Fig. 10 is an elevation of another arrangement of my inventionas when the cage is in motion. Fig. 11 is an elevation of the samearrangement as when the cage is stationary. Fig. 12 is a longitudinalsection through the form of gripper used in this arrangement. Fig. 13 isa transverse section of the same gripper when in the position indicatedin Fig. 11. Fig. 14 is a transverse section of the same gripper when inthe position indicated in Fig. 10.

In the views, A is the cage, to which are pivoted at (Z 6 two or moresafety-bars a I), connected together by rod 0. One end of the upper barfalls into an open staple a, fixed on the cage, and the other end isformed in the shape of a slotted quadrant f, in which slides the stud g,attached to the long U-shaped shield or gripper h, which is connected bythe links k k to hinges j j, attached to the cage A. At one side of thehand-rope Z, which controls the motion of the cage A, I fix by bracketsm m and stay-bolts two or more grippers n n, formed of india-rubber orother suitable material and suitably recessed to receive the hand-ropeZ. The action of this arrangement is as follows: WVhen the cage A is inmotion, the safety bars or gate a b is put across the entrance to thecage, and the action of so doing carries the shield-gripper h away fromthe india-rubber clips n 01., thus leaving the hand-ropeZ quite free foraction. When the cage is arrested at a landing, before the passengers inthe cage can leave the same or goods can be taken therefrom it isnecessary that the safety-bars a b be raised to the position shown inFig. '2.

The act of turning the bars a b on the pivots cl 6 lowers the slottedquadrant f, pulls inward the stud g and the shield-gripper h, whichlatter by this means forces the handrope lfirmly against theindia-rubber n n, and thus securely grips and holds fast the hand-ropeZ, so that the cage cannot be set in motion again until the safety-barsa b have been again placed in the position shown in Fig. 1.

In Figs. 5 to 9, inclusive, instead of using a slotted quadrant at oneend of bar a, I connect this end 1) by a rod q to a bell-cranked levers, pivoted to the gripper box or casing 1', through which the hand-ropepasses.

This

box may be fixed to the bottom of the cage, as shown, or in any otherdesired and convenient position on the walls, top, or other part of thecage.

w w are two india-rubber cushions or buffers to the gripping-plates u 0,which are suitably recessed, as shown, to embrace the handrope I. Thegripping-plate u and buffer 10 fit into the box t, which slides freelyin casing a and is formed, as shown, with a slotted branch to receiveone end of the lever s. The action of this arrangement is such that whenthe cage A is in motion and the safety-bar a is across the'entrance theend 1) of the safetybar, the rod q, and lever s draw the sliding box ifand gripper-plate it away from the hand-rope Z, which thus is left quitefree for action, as shown in Figs. 5 and 9.

The act of raising the bar a depresses end 1) and rod q, turns lever s,and so slides the box t forward and forces the gripper-plate u andhand-ropel against the other gripperplate '0, by which means thehand-rope is firmly gripped between the two grippingplates.

Figs. 10 to let show another arrangement of myinvention nearly sin1 ilarto the preceding arrangement, but in this case two or more safety-barsare used, and the eccentric or cam s,'fixed on bar I), actuates thesliding box 6 and gripper-plate u in place of lever sin the precedingarrangement. The action is the same in both arrangements.

In the constructions illustrated on Sheets 1 and 3 the bar a, may beheld to constitute the hand-rail or gate and the bar I) an intermediatelever connected to the hand-rope.

hat I claim as my invention, and desire to secure by Letters Patent, is

The combination of the hand-rope-gripping device, the hand-rail or gate,the intermediate lever-and-rod connection, and the rubber or elasticbuffers arranged in connection with said hand-ropegripping device, allas set forth.

In testimony whereof I afiix my signature in presence of two witnesses.

JAMES XVILSON MARTIN.

Vitnesses:

LEONARD IMLEDON, NORMAN WANSTALL.

